<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>折线图</title>
    <style>
        #box {
            width: 900px;
            height: 500px;
            margin: 10px auto;
        }
    </style>
</head>

<body>
    <div id="box"></div>
</body>
<script src="./a//echarts.min.js"></script>
<script>
    const box = document.querySelector('#box')
    const charts = echarts.init(box)
    let base = +new Date(1968, 9, 3);
    let oneDay = 24 * 3600 * 1000;
    let date = [];
    let data = [Math.random() * 300];
    for (let i = 1; i < 20000; i++) {
        var now = new Date((base += oneDay));
        date.push([now.getFullYear(), now.getMonth() + 1, now.getDate()].join('/'));
        data.push(Math.round((Math.random() - 0.5) * 20 + data[i - 1]));
    }
    option = {
        tooltip: {
            trigger: 'axis',
            position: function (pt) {
                return [pt[0], '10%'];
            }
        },
        title: {
            left: 'center',
            text: 'Large Area Chart'
        },
        toolbox: {
            feature: {
                dataZoom: {
                    yAxisIndex: 'none'
                },
                restore: {},
                saveAsImage: {}
            }
        },
        xAxis: {
            type: 'category',
            boundaryGap: false,
            data: date
        },
        yAxis: {
            type: 'value',
            boundaryGap: [0, '100%']
        },
        dataZoom: [{
                type: 'inside',
                start: 0,
                end: 10
            },
            {
                start: 0,
                end: 10
            }
        ],
        series: [{
            name: 'Fake Data',
            type: 'line',
            symbol: 'none',
            sampling: 'lttb',
            itemStyle: {
                color: 'rgb(255, 70, 131)'
            },
            areaStyle: {
                color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{
                        offset: 0,
                        color: 'rgb(255, 158, 68)'
                    },
                    {
                        offset: 1,
                        color: 'rgb(255, 70, 131)'
                    }
                ])
            },
            data: data
        }]
    };
    charts.setOption(option)
</script>

</html>